Finding the Third Proportional to 79,390 and 108,860

Step by Step Solution

1. Step 1: Write the proportion equation
   79,390 : 108,860 = 108,860 : x
2. Step 2: Convert to fraction form
   79,390/108,860 = 108,860/x
3. Step 3: Cross multiply
   79,390x = 108,860 × 108,860
4. Step 4: Simplify right side
   79,390x = 11,850,499,600
5. Step 5: Solve for x
   x = 11,850,499,600/79,390
6. Step 6: Final answer
   x = 149,269.42